Steam-boiler.



PATENTED JAN. 14, 1908.

' 2 SHEETS-SHEET l.

II IIHHH IIIHIHIHIIIII I" IIVI/ENTOR WITNESSES:

BY Mtg) ATTORNEY PATENTED JAN.14,'1908.

0.1): MOSHER/ STEAM BOILER.

APPLICATION YILEI) DEG. 24, 1906.

2 SHEETS-SHEET 2.

00000 0000026 coco 0000025 00000 2500000 oooc oooooooo $0000 dooooooo00000 00000000 00000000 Qoooo oooooooo oooooooo 00000000 00000000 0000000000000 00000 00000000 oooooooo INI/ENTOR ATTORNEY UNITED STATESCHARLES D. MOSHEB,

PATENT onnron.

on NEW YORK, N...Y.

STEAM-13011 1112;

misvenve.

Specification of Letters Patent.

Patented Jan. 14,1908.

Application filed December 24, 1906- Serial No. 349.316

embodying myimprovements- Fig. 2 rep resents a ongitudinal sectionthereof.

In the drawings, 10 is an upper steam-and water drum, -11 11 are twoparallel Witter- 'drums wi h" a furnace grate 12 and combustion-chamberbetween them, and 13 are curved'water-tubes arran ed'in-two groups withtheir lower ends'fixed inthe res ective waterdrums llgand their upperen's. fixed the steam-'and-wat'er; ;1 0. These :tubes areadapted to thr"of holes 14 in the.

ughtwo rows 7 "10' oated opposite the u pfer ends-oftheube gr'oups and.provi ed with" detachable 'iclosersd 01 6 of, these closers isrepresented conventionally at 15' in Fig; 1-. They 3 i of any, suitablet e, but-it is important to note that they s ould constitute actualstoppers .for the; holes legend. that the -tubes are removable only"bylo ening the boiler through the removal ,of t ese closers, as V will.bei hereinafter explained. In the' enjd .ofi-the jdrum 10- is aman-holeropening lfi jhav'ingga removable coverLorfcloser17-gj i I18*{i's boiler-casing. for guidin the gases of combustion. tube g'roupsaround if the steam-and water drum-l0 to astac 0.1 uptakearopening 19,-

this lc'asing being. separated-:" aconsiderable distance from the lflatpointsg'm'line' withdrawn'by with theftubes asthey are projectedthrough the' openings :14, I The diameter of thefsteam-andrwater drum 10is'less than the flength 0f the tubes 13 so that the tubes are reventedfrom being and then with'd fawing them through the manhole inth'e end ofthe drum as has-beenhere tofore pro osed, but the diameter of the orwith the additional space between said drumandthewalls of. the casingjup wllardly "from the a'ssingt em'into the drum 10 18 is sufficient toenable'any tube '13, upon being disengaged at its lowerfe'nd from thedrum 11, to be passed upwardly through one of the holes 14 in the wallof the", drum 10 after the closer 15 has been removed, wherethe drum 10,as indicated in Fig. 2",and passed. back entirely Within the drum, andmay then be removed from the boiler through the manhole 16 in the end ofthe drum. The holes 14 sufliciently exceed the diameter of the tubes topermit the latterto beslanted in the the drum. Certain of the tubes inthe lower parts of the tube groups may if desired through the end ofdrum 10. v

My invention enables. 'me to employfia steam anc'l water drum ofcomparatively small diameter in relationto the Ian th of the .tubes andthusretain strength and a mini- .m'ulnamount of material in: this drum,to-

the same time it affords a'means for taking .0i1t tubes through the' endof the steam-andwaterdrum. This enables the boilers to be excluded if itwere necessary to ass the tubes entirely through the up or shell ofthesteamand-water drum.- Suc a situation is encountered, for example,

i'close. up under the armored deck of a war vessel. tubes partly throughthe upper shell of the .drum' without removing any parts of theboiler-casing, although of courseopenings ma be pro'videdin the casingif it is desired Such opemngs how'ever would not be essen-' described,when the and related in accordance with my invention. Instead of curvedtubes, straight tubes may ,be' used as shown in my Patent No. 657,783,with a plurality of rows of removal-holes, and various-changes may bemade in regard to the numberand arrangement of tube-groups as well as inother particulars of construction. The main slightly, as shown, is toallow them to expand Without'warping' and to make the zone ofremoval-holes 14 narrower than the zone of Ltube-ends in the tube-sheet.Excessive curvature-however isto be avoided, as adversely upon the tubemay be slanted lengthwise of mannerindicated in passing them back intoused in. situations from which they would be in locating boilers to aveconvenient access to the closers 15.

tial to-the' removal of tubes by the method parts are constructed.

purpose of curving the tubes be removedby passing them-up into the 7stack-opening '19 Without withdrawing them,

gether with relatively-long tubes, while at -I am alsov enabled-towithdraw the to, any particular shape or location of tubes.

They may be either curved or straight, butthe arrangement of some of thetubes at least is such that the retracted tube-lines extend above thetop 0 drum 10, which would necessitate the lowering of the boiler toavoid an adjacent impervious deck or other ob,

struction if tube-removal could be accomplished only b withdrawing thetubes comple[tel1y throug the upper wall of the drum.

0 sum:-

- A steam boiler'comprising an upper steam:

and-water drum formed with an end opening having a removable cover andwith holes in its upper wall for the assage of tubes, detachable closersfor sai holes, a lower water drum, a connecting group oftubes of greaterlength than the diameter of the steam-andwater drum and so arranged withrelation to the said holes that the lines of tube-passage through thelatter extend above the :top of the steam an'dwater drum; the said tubesbeing. substantially smaller than the holes and removable by passingthem through the a turning them into the drum. and passing therntout ofthe latterthrough the end openholes partly outslde of the boiler andthen reingQand a casing forthe' fluegases,having a portion in the lineof tube-removal and distant from the steam-,and-water drum far enough topermitthe lower ends of the tubes to enter sald drum butnot so far as topermit withdrawal of the tubes complete upward from said drum.

In testimony'whereof I have hereunto set my hand in the presence of twosubscribing witnesses, the 14th day of December, 1906-.

.qCHARLES D. MOSHER. Witnessesz- R. M PIERsoN; G. BLAKE.

